silica
The main metallic element in the core of the moon is iron. Studies suggest that the moon has a small, solid inner core made mostly of iron with some nickel.
That is calcium.
Air is mostly Nitrogen.
Technetium is not a naturally-occurring element; it was created in a laboratory.
Coal is composed mostly of the element carbon.
The most abundant element on the moon is oxygen, which is primarily found in the form of oxides in the lunar regolith (surface material). Silicon, aluminum, and iron are also common elements present on the moon.
Mostly fund in igneous rocks.theyre very hard to get out,bug scientists know how to do that.
Xenon is an element. It is mostly found in atomic form but can exist as a diatomic molecule.
Uranium is found in the earth only in the form of compounds. Uranium is present in cca. 200 minerals.
Copper
Ir is a very rare element; the probable concentration in the surface rocks may be 10 pg/kg.
selenium is the element whose name is moon in Greek